Insensitive Halloween costumes get more popular every year. They almost outrank scary and sexy costumes--two of the best-selling categories. From a simple dress-up, Halloween has morphed into an adult event to make statements, press an agenda and mock others. This year the tackiest Halloween costume has several competitors. First is the "Call Me Caitlyn" costume of Caitlyn Jenner (formerly Bruce Jenner). Then there's a Cecil the Lion killer Halloween costume. Will a Walter Palmer costume--with blood-spattered dentist uniform and stuffed lion head--win 2015's tackiest? It's a close call.Cecil the Lion killer Halloween costume: Walter Palmer costume 2015's tackiest? | Examiner.com